### FILE="Main.annotation"
# Copyright:	Public domain.
# Filename:	TVCMASSPROP.agc
# Purpose:	Part of the source code for Artemis (i.e., Colossus 3),
#		build 072.  This is for the Command Module's (CM)
#		Apollo Guidance Computer (AGC), we believe for
#		Apollo 15-17.
# Assembler:	yaYUL
# Contact:	Steve Case <case1780@adelphia.net>
# Website:	www.ibiblio.org/apollo/index.html
# Page scans:	www.ibiblio.org/apollo/ScansForConversion/Artemis072/
# Mod history:	2009-09-13 SMC	Adapted from Comanche055 files.
# 		2009-09-14 JL	Fix typos. Fix page numbers. Remove change comments. Restore hard tabs.
#		2010-02-20 RSB	Un-##'d this header.

## Page 954

# PROGRAM NAME....MASSPROP
# LOG SECTION....TVCMASSPROP		PROGRAMMER...MELANSON (ENGEL, SCHLUNDT)
#
#
# FUNCTIONAL DESCRIPTION:
#
#	MASSPROP OPERATES IN TWO MODES:(1)IF LEM MASS OR CONFIGURATION ARE UPDATED (MASSPROP DOES NOT TEST
# FOR THIS) THE ENTIRE PROGRAM MUST BE RUN THROUGH, BREAKPOINT VALUES AND DERIVATIVES OF THE OUTPUTS WITH
# RESPECT TO CSM MASS BEING CALCULATED PRIOR TO CALCULATION OF THE OUTPUTS. (2)OTHERWISE, THE OUTPUTS CAN BE
# CALCULATED USING PREVIOUSLY COMPUTED BREAKPOINT VALUES AND DERIVATIVES.
#
# CALLING SEQUENCES
#
#	IF LEM MASS OR CONFIGURATION HAS BEEN UPDATED, TRANSFER TO MASSPROP, OTHERWISE TRANSFER TO FIXCW.
#		L	TC	BANKCALL OR IBNKCALL
#		L+1	CADR	MASSPROP
#			OR
#		L+1	CADR	FIXCW
#
#		L+2	RETURNS VIA Q
#
# CALLED   IN PARTICULAR BY DONOUN47 (JOB) AND TVCEXECUTIVE (TASK)
#
# JOBS OR TASKS INITIATED - NONE
#
# SUBROUTINES CALLED - NONE
#
# ERASABLE INITIALIZATION REQUIRED
#
#	LEMMASS MUST CONTAIN LEM MASS SCALED AT B+16 IN KILOGRAMS
#	CSMMASS MUST CONTAIN CSM MASS SCALED AT B+16 IN KILOGRAMS
#
#	DAPDATR1 MUST BE SET TO INDICATE VEHICLE CONFIGURATION.
#		BITS (15,14,13)  =  ( 0 , 0 , 1 )	LEM OFF
#				    ( 0 , 1 , 0 )	LEM ON (ASCNT,DSCNT)
#				    ( 1 , 1 , 0 )	LEM ON (ASCNT ONLY)
#
#
# ALARMS - NONE
#
# EXIT -   TC     Q
#
# OUTPUTS:
#
#	(1)IXX, SINGLE PRECISION SCALED AT B+20 IN KG-M SQ.
#	(2)IAVG, SINGLE PRECISION SCALED AT B+20 IN KG-M SQ.
#	(3)IAVG/TLX, SINGLE PRECISION, SCALED AT B+2 SEC-SQD
#	THEY ARE STORED IN CONSECUTIVE REGISTERS IXX0, IXX1, IXX2
#
#	CONVERSION FACTOR:  (SLUG-FTSQ) = 0.737562 (KG-MSQ)
#
## Page 955
#
# OUTPUTS ARE CALCULATED AS FOLLOWS :
#
#  (1) IF LEM DOCKED, LEMMASS IS FIRST ELIMINATED AS A PARAMETER
#
#	VARST0 = INTVALUE0 + LEMMASS(SLOPEVAL0)		IXX		BREAKPOINT VALUE
#	VARST1 = INTVALUE1 + LEMMASS(SLOPEVAL1)		IAVG		BREAKPOINT VALUE
#	VARST2 = INTVALUE2 + LEMMASS(SLOPEVAL2)		IAVG/TLX	BREAKPOINT VALUE
#
#	VARST3 = INTVALUE3 + LEMMASS(SLOPEVAL3)		IAVG/TLX	SLOPE  FOR CSMMASS > 33956 LBS  ( SPS > 10000 LBS)
#	VARST4 = INTVALUE4 + LEMMASS(SLOPEVAL4)		IAVG		SLOPE  FOR CSMMASS > 33956 LBS  ( SPS > 10000 LBS)
#
#	VARST5 = INTVALUE5 + LEMMASS(SLOPEVAL5)		IXX		SLOPE  FOR ALL VALUES OF CSMMASS
#
#	VARST6 = INTVALUE6 + LEMMASS(SLOPEVAL6)		IAVG		SLOPE  FOR CSMMASS < 33956 LBS  ( SPS < 10000 LBS)
#	VARST7 = INTVALUE7 + LEMMASS(SLOPEVAL7)		IAVG/TLX	SLOPE  FOR CSMMASS < 33956 LBS  ( SPS < 10000 LBS)
#
#	VARST8 = INTVALUE8 + LEMMASS(SLOPEVAL8)		IAVG		DECREMENT  TO BRKPT VALUE WHEN LEM DSCNT STAGE OFF
#	VARST9 = INTVALUE9 + LEMMASS(SLOPEVAL9)		IAVG/TLX	DECREMENT  TO BRKPT VALUE WHEN LEM DSCNT STAGE OFF
#
#  (2) IF LEM NOT DOCKED
#
#	VARST0 = NOLEMVAL0	WHERE THE MEANING AND SCALING OF VARST0
#	  .	    .		TO VARST9 ARE THE SAME AS GIVEN ABOVE
#	  .	    .
#	  .	    .		NOTE... FOR THIS CASE, VARST8,9 HAVE NO
#	VARST9 = NOLEMVAL9	MEANING (THEY ARE COMPUTED BUT NOT USED)
#
#  (3) THE FINAL OUTPUT CALCULATIONS ARE THEN DONE
#
#	IXX0 =  VARST0 + (CSMMASS + NEGBPW)VARST5		IXX
#
#	IXX1 =  VARST1 + (CSMMASS + NEGBPW)VARST(4 OR 6)	IAVG
#
#	IXX2 =  VARST2 + (CSMMASS + NEGBPW)VARST(3 OR 7)	IAVG/TLX
#
# THE DATA USED CAME FROM CSM/LM SPACECRAFT OPERATIONAL DATA BOOK.
#	VOL. 3, NASA DOCUMENT SNA-8-D-027 (MARCH 1968)
#
# PERTINENT MASS DATA :		CSM WEIGHT  (FULL)  64100 LBS
#					    (EMPTY) 23956 LBS
#				LEM WEIGHT  (FULL)  32000 LBS
#                               	    (EMPTY) 14116 LBS
#
# (WEIGHTS ARE FROM AMENDMENT #1 (APRIL 24,1968) TO ABOVE DATA BOOK)

## Page 956
		SETLOC	DAPMASS
		BANK
		EBANK=	CNTR
		COUNT*	$$/MASP


MASSPROP	CAF	NINE		# MASSPROP USES TVC/RCS INTERRUPT TEMPS
 +1		TS	PHI333		# SET UP TEN PASSES
LEMTEST		CAE	DAPDATR1	# DETERMINE LEM STATUS
		MASK	BIT13
		EXTEND
		BZF	LEMYES

LEMNO		INDEX	PHI333		# LEM NOT ATTACHED
		CAF	NOLEMVAL
		TCF	STOINST

LEMYES		CAE	LEMMASS		# LEM IS ATTACHED
		DOUBLE
		EXTEND
		INDEX	PHI333
		MP	SLOPEVAL
		DDOUBL
		INDEX	PHI333
		AD	INTVALUE

STOINST		INDEX	PHI333		# STORAGE INST BEGIN HERE
		TS	VARST0
		CCS	PHI333		# ARE ALL TEN PASSES COMPLETED
		TCF	MASSPROP +1	# NO - GO DECREMENT PHI333

DXTEST		CCS	DAPDATR1	# IF NEG, BIT15 IS 1, LEM DSCNT STAGE OFF
		TCF	FIXCW
		TCF	FIXCW
		DXCH	VARST0 +8D
		DAS	VARST0 +1
		CA	DXITFIX
		ADS	VARST0 +7

FIXCW		CAF	BIT2		# COMPUTATION PHASE BEGINS HERE.  SET UP
		TS	PHI333		# THREE PASSES
		TS	PSI333

		CAE	CSMMASS		# GET DELTA CSM WEIGHT - SIGN DETERMINES
		AD	NEGBPW		# SLOPE LOCATIONS.
		DOUBLE
		TS	TEMP333

		EXTEND
		BZMF	PEGGY		# DETERMINE CORRECT SLOPE
## Page 957
		CAF	NEG2
		TS	PHI333

PEGGY		INDEX	PHI333		# ALL IS READY - CALCULATE OUTPUTS NOW
		CAE	VARST5		# GET SLOPE
		EXTEND
		MP	TEMP333		# MULT BY DELTA CSM WEIGHT
		DOUBLE
		INDEX	PSI333
		AD	VARST0		# ADD BREAKPOINT VALUE
		INDEX	PSI333
		TS	IXX		# ****** OUTPUTS (IXX0, IXX1, IXX2) ******


		CCS	PSI333		# BOOKKEEPING  - MASSPROP FINISHED OR NOT
		TCF	BOKKEP2		# NO - GO TAKE CARE OF INDEXING REGISTERS

		CAE	DAPDATR1	# UPDATE WEIGHT/G
		MASK	BIT14
		CCS	A
		CA	LEMMASS
		AD	CSMMASS
		TS	WEIGHT/G	# SCALED AT B+16 IN KILOGRAMS
ENDMASSP	TC	Q

BOKKEP2		TS	PSI333		# REDUCE PSI BY ONE
		EXTEND
		DIM	PHI333
		TCF	PEGGY

## Page 958

NOLEMVAL	DEC	25445. B-20
		DEC	87450. B-20
		DEC	.30715 B-2
		DEC	1.22877 E-5 B+12
		DEC	1.6096 B-6
		DEC	1.54 B-6
		DEC	7.77177 B-6
		DEC	3.46458 E-5 B+12

INTVALUE	DEC	26850 B-20
		DEC	127518 B-20
		DEC	.54059 B-2
		DEC	.153964 E-4 B+12
		DEC	-.742923 B-6
		DEC	1.5398 B-6
		DEC	9.68 B-6
		DEC	.647625 E-4 B+12
		DEC	-27228. B-20
		DEC	-.206476 B-2

SLOPEVAL	DEC	1.96307 B-6
		DEC	27.5774 B-6
		DEC	2.3548 E-5 B+12
		DEC	2.1777 E-9 B+26
		DEC	1.044 E-3 B+8
		DEC	0
		DEC	2.21068 E-3 B+8
		DEC	1.5166 E-9 B+26
		DEC	-1.284 B-6
		DEC	2. E-5 B+12

NEGBPW		DEC	-15402.17 B-16
DXITFIX		DEC*	-1.88275 E-5 B+12*
